Answer:
24 kgm/s
Explanation:
Momentum (p) = mass x velocity
Mass = 3kg , velocity 8m/s
momentum (p) = 3kg x 8m/s
= 24kgm/s
Answer:
See explanation
Explanation:
To find out the electronic structure of each element, you must know the number of electrons it contains.
If you find that out(the number of electrons in the neutral atom of an element is the same as its atomic number). Then you arrange those electrons in such a way that the first shell has only two electrons and subsequent shells have eight electrons.
Look up the groups to which the elements belong in the periodic table All the elements are in group 1 so the last shell must have only one electron.
Given
The projectile is in air for a time of t=8 sec
To find
The time it takes to reach the highest point
Explanation
A projectile moves up to the highest point and then again moves down following a parabolic path.
So it will reach the highest point at a time half the time it requires to follow teh parabolic path.
The time taken to reach the highest point is 4 sec
Conclusion
The time taken is 4 sec.
The range of a projectile motion is given by:
where, 
is the initial speed of the projectile, 
is the angle of the projectile and 
is the acceleration due to gravity.
The maximum height reached is given by:
Part a
It is given that the maximum height reached is equal to the horizontal range. we need to find the angle of the projectile.
Equating the two:
Hence, the projectile was thrown at an initial angle of 
.
Part b
we need to find the angle for which range would be maximum and then write this maximum range in terms of original range.
So, we know that range is given by:
It would be maximum when 
Hence, 
Original range,
Part c:
In the part a, we know that the angle of the projectile is independent of the i.e. the acceleration due to gravity and this is the only factor that varies with the different planets. Hence, the answer would remain same.
Answer:
The force of gravity in keeping an object in circular motion is an example of centripetal force. Since it acts always perpendicular to the motion, gravity does not do work on the orbiting object if it is in a circular orbit.
Explanation:
